Distortion check for welding apparatus



Feb. 1, 1938. c, POWELL 2,106,987

DISTORTION CHECK FOR WELDING APPARATUS Filed Dec. 22, 1956 bf m Patented Feb. 1, 1938 UNITED STATES alum ms'roa'rron one: son wlmmo mmrus 0. Powell. Portsmouth, Va.

Application December 22, 198, Serial No. 117,388

4Clalms.

' This invention relates to a distortion check for welding apparatus and is an improvement over the structure embodied in my Patent Number 2,076,207, granted April 6, 1937.

An object of this invention is to provide an improved clamping bar for use in clamplng articles to be welded together on to a bed or support, with the clamping bar so constructed that not only the clamping bar but the article to be weldedwill be cooled at points outwardly from the point of welding to thereby prevent buckling or distortion of the article or articles which 'are bein welded together.

Another object of this invention is to providean improvedclamping bar which is so constructed that it will not only prevent the articles which are being welded together from buckling but will also firmly maintain fiat plates or the like on to a flat bed.

A further object of this invention is to provide an improved article clamping bar for use with welding apparatus which includes means engageable with the bar intermediate the ends thereof so as to hold the bar'against longitudinal bending under the action of end clamps .or bolts in order to snugly hold plates or the like on to a flat bed.

With the foregoing and other objects in view,

the invention will be more fully described here-,

inafter: and will be more particularly pointed out in the claims appended hereto.

In the drawing, wherein like symbols refer to like or corresponding parts throughout the several views,

' Figure l is a view in plan of the-work holding device constructed according to an embodiment Referring to the drawing, the numeral I. d?

ignates generally a bed which, in'the present instance, is provided with a flat top and is also' provided with a plurality of longitudinally spaced apart holes I 3 to receive clamping bolts. ll, which are adaptedv to engage through a clamp-. ing bar II. The clamping bar I! is adapted to engage on the upper or outer side of a pair of plates P and P! which are adapted to lie flat on top of the bed ill with the abuttina edges of the plates P and P being disposed centrally of an a cooling agent therethrough.

elongated'slot it which extends longitudinally of the clamping bar II. The clampin bar I! is provided on the under side thereof with a downwardly opening channel I! and gaskets I. and

'H engage against the under side of theclamjps ing bar ii on opposite sides of the channel I! so that when the bar I! is clamped on to the plates P and-P, the gaskets ii and i! will seal the channel I! and. thus permit the cot One end of the channel II is provided with an intake pipe or connection I 8 and the other or outlet end has an outlet pipe ll connected thereto so that a cooling medium in the form of water or the like may be circulated through the chanl5 plates, the gaskets l0 and "will contact with go the bed 'II and thus prevent any leakage of the cooling medium out of the channel II.

The clamping bar I! also has a second tensioning bar 2| mounted on the upper side thereof which is provided with a plurality of spaced gs apart holes 2| which are threaded and through which bolts 22 are adapted to engage. These bolts 22 are adapted to contact with the upper surface of the lower bar member I! so that the intermediate portion of the upper or 80 tensioning bar I. may be bowed between the clamping bolts II and thus prevent longitudinal bending of the lower bar l2, particularly at the intermediate portion under. the pressure of the clamping bolts ll. 36

- m the use of this device, the two plates P and P are placed on top of the bed II with the edges to be weldedtogether in abutting relation ,and then the lower clamping bar I! is placed overthe platesPandP',withtheabuttingedges 40 of the two plates disposed in the slot It. The bolts H are then tightened so as not only to hold the plates Panel P flrmlyontho bad II, but also to effect a sealing'of thechannel ll above thepiatesPandP'andoutwardlyoftheouter All edges thereof.- The bolts 22 may be turned so as to place the bar tensioning member II under tension and thus hold the lower bar it against longitudinal bending under the action of the,

.clflilpmlboltlll. 'rheooolingmodiummthen M be circulated through the intake connection II and then out through the outlet connection II and the two plates P and P yelded'together in the usual manner 'l'h rou'ghtheuoeofacoolimmoans,ashoseinbefore described, the articles which are to be welded together are not only prevented from buckling or bending but the clamping bar itself is maintained in a relatively cool condition. In the event the gaskets it and I! will not iiex sumciently to adequately seal the channel I! outwardly of the opposite edges of the plates P and P, additional gaskets may be inserted to fill up the space so that the cooling medium which is passed through the channel II will not leak out thereof.

It is, of course, understood that various changes and modifications may be made in the details of construction and design of the above specifically described embodiment of this invention without departing from the spirit thereof, such changes and modifications being restricted only by the scope of the following claims.

I claim:- i

1. A distortion check as set forth, comprising a bed adapted to receive a pair of articles to be welded together, an article clamping bar provided with an elongated slot therein. means for clamping the bar on to the bed, a second slotted bar engaging the outer side of said first bar and engageable beneath the clamping means of said first bar adjacent the ends thereof, and threaded means carried by said second bar and engageable with the first bar intermediate the ends thereof to hold said first bar against longitudinal bending.

2. A distortion check as set forth, comprising a bed adapted to receive a pair of articles to be welded together, a clamping bar for holding said articles on to the bed, means for clamping said bar over said articles and on to the bed, said bar having an elongated slot extending longitudinally thereof and provided with a channel in the under side thereof on opposite sides of the slot and at each end thereof, said channel opening through the under side of said bar, means for circulating a cooling medium through said channel, and means engaging said bar on the outer side thereof to hold said bar against longitudinal bending.

3. A distortion check as set forth, comprising a bed adapted to receive a pair of articles to be welded together, an article clamping bar provided with an elongated slot therein, means for clamping the bar on to the bed, a second slotted bar engaging the outer side of said first bar and engageable beneath the clamping means of said first bar adjacent the ends thereof, and means carried by said second bar and engageable with the first bar intermediate the ends thereof to hold said first bar against longitudinal bending.

4. A distortion check as set forth, comprising a bed adapted to. receive a pair of articles to be welded together, a clamping bar for holding said articles on to the bed, means for clamping said 

